Re: Block Drain Plug Removal
Yes, a Pain in the butt. GM hired or still has, the gorilla on the employment list.
Since the plugs are socket plug, you can drill out the center to drain the coolant and rinse out the sediment at the bottom of the water jacket.
A couple of choices:
1. You drill and tap the remaining 1/4 NPT plug for a 1/8 NPT petcock.
2. Get a Gr 5 bolt to fit the socket depth and gave it 360° welded to the plug.
3. Some have said to drip candle wax over the threads, but the block needs to be upside down as on an engine stand. Kind of hard to defeat gravity.
4. Buy a Harry Potter wand from the Wizard store.
I suggest on the drvr side, since the drain is close to the engine isolator, to install first a 45° elbow with it pointing some to the rear, then install the petcock.
I would also suggest in installing petcocks and hand tighten them the petcock, but add 1/2 turn of the body into the block.
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